FLOSS Weekly just talked to Jeff Squyres about Open MPI. Open MPI is one implementation of the message passing interface (MPI) standard. Open MPI can be used with mpIDL to use MPI within IDL. Particularly interesting was the discussion about connections with GPU computing (we recently made an mpiDL/GPULib example which ran on a “personal supercomputer” with three Tesla graphics cards).
FLOSS Weekly is a approximately weekly show about open source projects hosted by Leo Laporte and Randall Schwartz. Coming up in the next month is a show about Processing!
Full disclosure: I work for Tech-X Corporation and worked on the IDL bindings and examples for mpiDL and GPULib.